The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 800 g?
- How much is the postage if a parcel has a mass of 1.7 kg?
(a)
Postage cost of the parcel with a mass of 800 g
= 3.90 + 0.70
= $4.60
(b)
1 kg = 1000 g
1.7 kg = 1.7 x 1000 = 1700 g
Cost for first 750 g = $3.90
Remaining mass
= 1700 - 750
= 950 g
Number of sets of 50 g
= 950 ÷ 50
= 19
Cost for remaining 950 g
= 19 x 0.70
= $13.30
Postage cost of the parcel with a mass of 1.7 kg
= 13.30 + 3.90
= $17.20
Answer(s): (a) $4.60 (b) $17.20